Manhole cover



FIG. 1 is a perspective view of a manhole cover showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the rear elevation being a mirror image thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a side elevational view thereof, the other side elevation being a mirror image thereof. 

The ornamental design for a manhole cover, as shown and described. 